Dover, Funny you say that about "converting" the Verdier to thread drive. Nearly all, if not actually all, the Verdiers I have ever seen have been using thread drive. I actually thought it was "stock". One well known emporium near me that sells Verdier places the motor about 3 feet away from the platter and uses a thread drive. I've often wondered how the heck they can keep the thread from slipping down the smooth sides of the platter.
Richard, You voiced my own thoughts on the pitfall of a coreless motor; the orientation of the magnet and coils is at 90 degrees to that of a conventional motor, and this would result in max field strength in the vertical direction. Plus, the coreless motor is very close to the underside of the platter, much closer to the platter than a conventional motor in a Technics or other similar DD. I've noted that the L07D motor is a completely discrete unit, sealed in a casing shaped like a movie version of a flying saucer. Do you think the casing is made of mu metal or something with similar shielding properties? If so, why do we perceive that adding another shield under the platter mat makes a further improvement?
Richard, You voiced my own thoughts on the pitfall of a coreless motor; the orientation of the magnet and coils is at 90 degrees to that of a conventional motor, and this would result in max field strength in the vertical direction. Plus, the coreless motor is very close to the underside of the platter, much closer to the platter than a conventional motor in a Technics or other similar DD. I've noted that the L07D motor is a completely discrete unit, sealed in a casing shaped like a movie version of a flying saucer. Do you think the casing is made of mu metal or something with similar shielding properties? If so, why do we perceive that adding another shield under the platter mat makes a further improvement?